body
{
    border: 1px solid white;
    margin: 0px;
}
header
{
    margin: 0px;
    width:100%;
    background-color: #F5F5F5;
    height: 48px;
    float: left;
    position: fixed;
}
header img
{
    padding-left: 120px;
    float: left;
    height: 30px;
    padding-top: 10px;
}
#logo
{
    margin:0.5em;
    height: 30px;
    float: left;
    font-size: 20px;
    color: black;
    font-family: "Lato","Helvetica Neue","Microsoft YaHei",Arial,Helvetica,sans-serif;
}
#logo:link, #nav-txt li a:link,#log li a:link
{
    text-decoration: none;
    color: black;
}
#nav-txt li ,#nav-txt li a,#log li a
{
    display: inline-block;
    float: left;
    padding-left: 1rem;
    color:black;
}
input
{
    margin-left: 2.5em;
    height: 25px;
    border: 0px;
    padding-top: 0px;
}
#log li
{
    display: inline-block;
    float: right;
    padding-right: 1em;
    color:black;
}
#log
{
    margin-right: 3.5em;
    float: right;
    margin-top: 0px;
}
#top
{
    margin-top:48px;
    background-color: #20B2AA;
    width: 100%;
    height: 350px;
}
#top h1
{
    padding-left: 300px;
    padding-top: 70px;
    color: white;
    font-family: '微软雅黑','Helvetica Neue',sans-serif,SimHei;
}
#top h2
{
    padding-left: 400px;
    padding-top: 10px;
    color: white;
    font-family: '微软雅黑','Helvetica Neue',sans-serif,SimHei;
}